Which mechanism best describes the process by which nutrients are taken up selectively at the apical surface of the epithelial cells that line the gut and released from their basal and lateral surfaces?

Question

Quizplus · Accepted Answer

The process by which nutrients are selectively taken up at the apical surface of epithelial cells and released from their basal and lateral surfaces is called transcytosis. In this process, proteins and other molecules on the apical surface bind to specific receptors on the surface of the cell, and are then carried across the cell to be released at the basal or lateral surface. The movement of proteins across the cell is limited by the presence of a diffusion barrier, which ensures that only specific molecules are transported. Therefore, choice D is the best answer. Choices A, B, and C are not relevant to the process of transcytosis in the gut epithelium.

Which Mechanism Best Describes the Process by Which Nutrients Are